Review sheet for Genetics

Review Guide for Genetics
Name _____________________ Date _____ Period _____ Date of Test: ___________________________
Part I. Mitosis and Meiosis
1. What is mitosis? ______________________________________________________________________
2. Where does mitosis occur?______________________________________________________________
3. How many cells does mitosis create? _____________________________________________________
4. How many chromosomes are in each new daughter cell? ______________________________________
5. What is meiosis?_______________________________________________________________________
2. Where does meiosis occur?______________________________________________________________
3. How many cells does meiosis create? _____________________________________________________
4. How many chromosomes are in each new daughter cell? ______________________________________
6. What are the phases of mitosis? __________________________________________________________
7. What are the phases of meiosis? _________________________________________________________
8. Explain what happens in each phase of mitosis.
1. _______________________________________________________________
9. Who is Gregor Mendel? ________________________________________________________________
10. Name 5 facts about Gregor Mendel from the reading.________________________________________
Part II: Define the following:
1. Heredity ____________________________________________________________________________________
2. Dominant trait_______________________________________________________________________________
3. Genes ______________________________________________________________________________________
4. Recessive trait________________________________________________________________________________
5. Heterozygous traits____________________________________________________________________________
6. Homozygous trait_____________________________________________________________________________
7. Genotype____________________________________________________________________________________
8. Phenotype ___________________________________________________________________________________
9. Incomplete dominance _________________________________________________________________________
10. Codominance _________________________________________________________________________________
11. Punnett square _______________________________________________________________________________
11. traits ________________________________________________________________________________________
12. allele ________________________________________________________________________________________
13. cross : _______________________________________________________________________________________
Part III Practice Questions:
1. In pea plants, purple flower color (P) is dominant to white (p). Using this information list the genotypes and
phenotypes of the following individuals.
a. Heterozygous
b. Homozygous recessive
c. Homozygous dominant
2. What is the probability of producing a homozygous dominant purple flower if there is a cross between a heterozygous
pea plant and a homozygous dominant pea plant?
3. Black fur and white fur display incomplete dominance in rabbits. If a black furred rabbit and a white furred rabbit
mate, what color will the fu of their offspring be? If those offspring mate, what will their offspring look like?
4. If black fur and white fur in rabbits displayed co-dominance instead, what would the offspring of one black rabbit and
one white rabbit look like?
5. What is the probability that a heterozygous male for earlobe attachment and homozygous dominant female will have
offspring that have attached earlobes? What is the probability that the offspring will be heterozygous? * Unattached
earlobes (E) are dominant to attached earlobes (e)*
6. In cattle, the hornless condition (H) is dominant and the horned condition (h) is recessive. A bull without
horns is crossed with a cow with horns. Of the four offspring, one (1) is horned and three (3) are hornless.
Determine the genotype of the bull and the cow.
7. In humans, widow's peak (W) is dominant over a continuous hairline (w), and short fingers (F) are dominant
over long fingers (f). Two individuals with widow's peak and short fingers have a child with continuous
hairline and long fingers. Determine the genotype of the parents.
8. In humans, being right-handed (R) is dominant over being left handed (r). Two right-handed parents with
have a son who is left-handed. Determine the genotypes of the son and both parents. What can you tell me
about the phenotypes of the parents?
9. How can Punnett Squares and being able to find the probability of passing on a specific trait be helpful for a
couple who is having a child?
10. What is the Human Genome Project? What is the purpose of this project?
11. Why are polygenic traits more complicated than traits governed by one gene? Give an example of a
polygenic trait. Explain the difference between the phenotypes of polygenic traits and the phenotypes of single
gene traits.
12. Why are there so many different shades of eye color, skin color, hair color, etc.?
13. How is it possible for a person to have one green eye and one brown eye?
** Study pp. 12-14, 30-33, 36-40, 46-48 in Genetics Packet
** Study your Mitosis and Meiosis Notes in your notebook